Pleased to hear that the ELX Horizon arrived safe and sound. We have been shipping a ton of them these past few weeks.
Please leave the dampeners as is. The ELX Horizons now come with these installed, they are there to dampen spurious slot port resonances and fully optimize bass tuning.
Yes, please hit ignore. Audyssey doesn't seem to like the full range bass response and advanced crossover of the ELX, it is a common error with Audyssey (not just with our speakers, but with many full range speakers). When and if my time clears up a bit, I will look into this more as to how Audyssey actually measures the in-room phase response.
https://ask.audyssey.com/hc/en-us/ar...eaker-polarity
What speakers are you using as your left / right?